What I'd like to hear from various monks (and your stories need not involve criminal charges, actual or threatened) are stories about how failing to understand subtleties like list/scalar context differences caused you trouble. Feel free to change names, attribute them to cow orkers, etc. I just wanna hear the stories, not embarass or belittle anybody!
I don't have any stories like this, my biggest errors are stupid things like nearly crashing a Sun Enterprise class system by failing to delete my large files in /tmp =)
Philosophy can be made out of anything. Or less -- Jerry A. Fodor